After an impact occurs on the Moon, the walls of the crater often are too steep and:

A) slope failure occurs
B) channels are created
C) rivers are formed

Slope Failure

The movement and failure of slope material caused by gravity, water saturation, or other destabilizing factors.

Crater Walls

The steep sides that define the rim of a crater, often formed by explosions, impacts, or volcanic activity.

Steep

Characterizes an area of land having a sharp incline or slope, often referring to terrain that rises quickly over a short distance.